Significantly, this line marks the southern limit of the birch tree, a plant whose pollen is one of the causes of hay fever in northern Europe.

值得注意的是，这条线标志着桦树的南部界限，而桦树的花粉是引发北欧花粉热的一个原因。

Father, red sorghum claims to cure your fever; the age-old walnut tree professes.

父亲，红高粱说要治好您的发烧，老核桃树说。

Ornamental shrub or small tree of swampy areas in southwestern United States having large pink or white sepals and yielding Georgia bark for treating fever.

生长在美国西南部沼泽的一种观赏灌木或小乔木，具有大的粉红色或白色萼片，产生能够治疗疟疾的乔治亚树皮。